只需
global ser在函数内部使用：
ser = "foo"def reset_ser(): global ser del serprint(ser)reset_ser()print(ser)
输出：
fooTraceback (most recent call last): File "test.py", line 8, in <module> print(ser)NameError: name 'ser' is not defined
只需
global ser在函数内部使用：
ser = "foo"def reset_ser(): global ser del serprint(ser)reset_ser()print(ser)
输出：
fooTraceback (most recent call last): File "test.py", line 8, in <module> print(ser)NameError: name 'ser' is not defined
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